single fire ignition system - Page 2 - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #11 of 19 (permalink) Old 05-09-2005, 12:15 PM Thread Starter
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I just got a reply from Baron's. They have just hooked up a bullet tach to a C50. We need a single fire adaptor!!

know I have to go and get one.

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post #12 of 19 (permalink) Old 05-20-2005, 01:24 PM Thread Starter
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Quote:
Originally Posted by tlwisner
I just received my Single Fire Tach Adapter from Drag Specialties. Hooking up the tach to one coil gave me a nice reading of half of my rpms. I do know that the C50 uses different coils than the Volusia - so it is probably a safe bet that the ignition system is different.

Here's the description from this package:
"This assembly is used to combine the Ingition Pulse Signal from a Dual Coil System for driving the D&S Tachometer."

It connects to both coils (-) side, and then to the green Tach/Coil lead. I'll have this sucker up and running tonight.
Tim,
Did you get your tach hooked up?
I hooked mine up using the same adaptor and it reads high and then drops to zero.

Please let me know if how yours worked out.

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post #13 of 19 (permalink) Old 08-29-2005, 11:35 PM
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Dual fire ignition coil

Bill aka bmann,

I read your review of the single fire adapter on CruiserCustomizing which was written a couple of months before the message written by nbissett who got his to work(see his review on adapter on CruiserCustomizing). So, this means on the C50 each cylinder has it's own coil. Now, his tach was a Baron, but he had the same problem we have. The tach was reading half of actual RPM. He was able to get his C50 working with the single fire adapter by using a 33K 1/2 watt resistor with the adapter. CrusierCustomizing says you have to use two to three 10k 1/2 watt resistors for a VTX1800 on their website.

Baron required using an adapter for their tach too, but Nick used the Drag Specialties because the Baron's was $46, the DS was $21. Anyway, below are the e-mail communications I had with Nick. I just wondered if you had solved your tach problem. My adapter should come it from DS anytime. I am hoping I have the same luck as Nick


----Original Message-----
From: Nick
Sent: Tuesday, August 23, 2005 10:46 PM
To: Lee
Subject: RE: CruiserCustomizing Member Contact


I actually have a Baron tach. I just bought the Drag Specialties adapter due
to the fact it was cheaper than the Baron adapter. The 33K 1/2 watt
resistor works great. It reads just where it should. I have a Power
Commander on my bike and when hooked to may laptop has a digital readout on
the screen of my RPM's. It is the same as my tach.

Nick

-----Original Message-----
From: Lee
Sent: Tuesday, August 23, 2005 7:43 PM
To: Nick
Subject: CruiserCustomizing Member Contact

Nick,

I read your review on the single fire adapter for the Drag Specialties
Minitach. My DS reads about half of what I suspect the actual RPM is. Is
the reason you bought the adapter? Does it still work and provide accurate
readings with the adapter? Did you have to change resistors later or did
the 33K 1/2 watt provide the right RPM's? I would really appreciate any
information you could provide. It seems like few people know how to get
these to read the correct revs, but its an inexpensive tach if it can be
made to work.

Thanks for your help.

Lee
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post #14 of 19 (permalink) Old 09-06-2005, 06:57 PM
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so the volusia is a dual firing system 2 coils hitting independent of each other????? i had the stock tach(garbage) will be getting a new tach soon.

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post #15 of 19 (permalink) Old 09-06-2005, 10:41 PM Thread Starter
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I bought the adaptor from Baron's and It did read the correct RPM's but the needle bounced all the time except when I was on the throttle under a load. I have taken it off and it is just sitting in the box until I decide what to do with it. I tried selling it here with no luck.

I got frustrated tying to figure it out..

Here is an explination from Chris at Baron's as to why it bounces all of the time.

The new Suzuki's have a multi-spark ignition system, at idle, a tach will bounce all over the place, once the RPMs get high enough (and using an ignition adapter like the T-105) they will read correctly.

This is how it was explained to me:
When the piston comes to the top of its stroke, the spark plug on most motors fires, this is what the tach reads... on the new Zuks, the plug fires sending the piston back down, then fires several more times as an emission reducing thing... Nothing we can do about it.
When the motor on the Zuk is up in RPM the secondary sparks happen so fast that the tach cannot keep up with them, and thus reads only the primary spark, which is why it works fine at cruising RPM.

SO, I have a $200 tach that is useless on for my bike.
Thanks for the info.

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post #16 of 19 (permalink) Old 04-01-2006, 06:59 AM
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After reading all the posts on Tachs, I still have the same question I had before reading them. Is the C50 Boulevard a single fire, dual fire or multifire or a combination? Is single fire and multifire both happening? Is one piston at TDC and the other one down or are they both at TDC at the same time? Does anyone know whether an inductive pickup from the sparkplug wires would work better than the negative coil connections? If the two coils are firing alternately, how can they be additive to produce a full rpm reading instead of the half reading some people are getting? We need a clearer interpretation if so many people are having trouble installing tachs. The build your own crossover single fire adapter posted on this site is a good example of what we need more of. Maybe the author can clarify how this system works and provide some relief to these mysteries.
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post #17 of 19 (permalink) Old 04-01-2006, 07:21 AM Thread Starter
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On the Boulevard:

It has one Primary spark that ignites the fuel and multiple secondary much weaker sparks that burn the remaining fuel off.

ON my C50:
- w/o the adaptor MY RPM,s read half of what if should have been.

- with the adaptor I got the correct RPM reading but the tach needle would bounce all over the place because of the additional secondary sparks.

I do not know the correct name for it.

I sold my tach and have an adaptor siting in a draw in my garage that I will never use.

I hope this helped some.

You would think that someone could build an adaptor that filtered out the secondary sparks so that the tach would read correctly.

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post #18 of 19 (permalink) Old 11-26-2007, 12:08 PM
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If you are still around here and wanting a tach there are 2 different adapters as well as new tachs available to work on the C50.

Quote:
Originally Posted by bmann
On the Boulevard:

It has one Primary spark that ignites the fuel and multiple secondary much weaker sparks that burn the remaining fuel off.

ON my C50:
- w/o the adaptor MY RPM,s read half of what if should have been.

- with the adaptor I got the correct RPM reading but the tach needle would bounce all over the place because of the additional secondary sparks.

I do not know the correct name for it.

I sold my tach and have an adaptor siting in a draw in my garage that I will never use.

I hope this helped some.

You would think that someone could build an adaptor that filtered out the secondary sparks so that the tach would read correctly.

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post #19 of 19 (permalink) Old 11-26-2007, 02:05 PM
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I have the DS tach with the T-105 adapter. The T-101 adapter was recommended at the dealership where I got the tach, after first installing and getting the half rpm's reading. With the T-101, I got no readings at all, so, I called the manufacturer directly. They sent me, free of charge, the T-105 adapter. I have a correct reading but, as others have noted, quite a bit of bouncing. The tach reads steady if the throttle is positive. It bounces when backing off, or when it is slack. I can live with it, now that I am used to "the nature of the beast". It is nice, however, to now understand why the thing behaves as it does. Thank you all for your research. One can learn a lot on a rainy day by reading here on the VR site

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